Specifications

C-4
Reference Guide
Model No.
Running Head
Using the RS-485 Node Port
The RS-485 Node port allows you to activate external alarms that alert on-site personnel to
critical situations. Using the ACO function will keep the alarm active until it is manually
cleared form a control terminal.
Connect the NODE jack of the INF-E card to the external alarm equipment. This is another
RJ-48 jack; it provides a set of form-C relay contacts to the external alarm equipment. Figure
C-3 shows the pin locations on this jack, which are the same as the COM2 jack. Table C-2 lists
the associated signal pinouts.
Figure C-3. RJ48 Node Jack
Table C-2. RJ48 (NODE) Jack Signal Pinouts
The alarm interace is activated by the ACO setting. This will activate the device when a
designated alarm occurs. See chapter on Alarms to review the conditions and settings
necessary to enable this feature.
Connect pins 4 and 5 to provide an open relay contact to the external device upon occurrence
of an alarm. Or, connect pins 3 and 5 for a relay contact closure upon alarm.
RJ48 Pin Designation Function
1--- not used
2--- not used
3 ANC Alarm on Open Condition
4 ANO Alarm on Closed Condition
5 ACOM Alarm Common Lead (Source)
6--- not used
7--- not used
8 GND Chassis Ground
Pin 1
Pin 8